<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script>
			//基本变量
			var a = 10;
			var s = "培优课程";
			var colors = ["red", "black", "blue"];
			
			console.log(colors);
			console.log(colors[2]);
			
			//函数定义（方法）
			function add(a, b){
				return a+b;
			}
			
			//函数调用
			var r = add( 10, 20 );
			console.log(r);
		</script>
	</head>
	<body>
	</body>
</html>
